doc/v606/gerrors_8C.html

void gerrors() {

   TCanvas *c1 = new TCanvas("c1","A Simple Graph with error bars",200,10,700,500);


   c1->SetFillColor(42);

   c1->SetGrid();

   c1->GetFrame()->SetFillColor(21);

   c1->GetFrame()->SetBorderSize(12);


   const Int_t n = 10;

   Float_t x[n]  = {-0.22, 0.05, 0.25, 0.35, 0.5, 0.61,0.7,0.85,0.89,0.95};

   Float_t y[n]  = {1,2.9,5.6,7.4,9,9.6,8.7,6.3,4.5,1};

   Float_t ex[n] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};

   Float_t ey[n] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};

   TGraphErrors *gr = new TGraphErrors(n,x,y,ex,ey);

   gr->SetTitle("TGraphErrors Example");

   gr->SetMarkerColor(4);

   gr->SetMarkerStyle(21);

   gr->Draw("ALP");


   c1->Update();

}